Energy Saving for Ethylene Process by Advanced Process Integration

Ethylene production plant is one of the most important plants in petrochemical industry. The process requires a huge amount of low temperature cooling, so highly process integrated configurations created by applying PI (Process Integration) technology to the process was included in advanced processes. The process analysis for the advanced process was likely important for creating further new process configurations on energy saving. Accordingly, how contributed PI technology to creating a new process configuration was described here. The new network was Heat Integration between De-etanizer condenser and C2 splitter side stream liquid flow from the tray at stripping section. The energy saving benefit was 102 MUS$/y, CO(2) emission reduction was 7,360 t CO(2)/y, and payback time was 1.42 y.